George m



(N0 Madel.)

G. M. CLARK.

LAMP.

No. 359.845. Patented Mar. 22, 1887.

UNITED STATES PATENT @rrrcn.

GEORGE M. CLARK, OF CHICAGO, ILLINOIS.

LAMP.

SPECIFICATION forming part of Letters Patent No. 359,85, dated March 22, 1887.

Serial No. 187,941. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE M. CLARK, of Chicago, in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Lamps and Lanterns; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Thisinvention has for its object to provide an improved construction in devices for heating signal or heavy oils in lamps and lanterns by means of the lainp fiaine; and it consists, primarily, in the extension of the metallic heating-wire in a continuous loop over the flame, and preferably in the plane thereof, or substantially so, instead of arranging its ends apart from each other in the neighborhood of the flame or at opposite sides thereof, as in the constructions heretofore employed.

In the accompanying drawings, which illustrate a preferred form of myinvention, Figure 1. is a perspective View of a lamp-burner cap containing a flat wick and the heating-wire in the form of a loop over and in the plane of the wick-tube and flame. Fig. 2 is aside view of the same matters, and Fig. 3 is a top view thereof.

A represents the wick-tube of a burner, B the screw-cap in which the said tube is secured, and G the wire-heater by which the inflammable material which is to supply the wick is to be liquefied or rendered more limpid.

The cap B may be constructed with a wickratchet, as shown in Figs. 2 and 3, or without such ratchet, and with the usual slots in the tubeibr picking up the wicl;,as shownin Fig. 1.

The wire (3 is inserted in the cap B, and, as shown in the several figures, extends continuously in the form of a loop over the upper end of the wick-tube, and with its transverse portion 0 ata suitable distance above the same to stand over orin the extreme upper part ofthe flame, in order that it may not interfere with the illumination. The said transverse portion 1: of the wire 0 is preferably arranged in the same plane with the wick-tube or flame, so as to be most extensively exposed to the heating effects of the flame, for the purpose of greater efficiency. To the same end the vertical portions 0' of the wire 0 descend at the edges of the flame. On one side of the wiclctnbe and opposite the upper end of said tube the wire 0 is bent off to one side, as shown at a", so as to permit the convenient use of shears in trim ming off the wick without obstruction on the part of said wire. The wire G extends downward through the cap, (preferably at the points indicated, which givesrise to offsets 0 and has its lower ends separatcl y to form the eyes 0*, between which the wick may descend to the bottom of the oil-cup, and also between which, when lifted, it may rise freely without being deflected over the lower edge of the wick-tube and without danger of catching upon the said wires. In this construction the'wire is continuous over and in the plane of the flame, and besides being thereby exposed more effectively to the heating action of the flame it presents no free ends at the top, which would be liable to be bent out of place.

I am aware that heating-wires which were inserted through and secured to the top of the oil-pot have extended in loop form over the flame; but in that case it was not practicable to always insure the desired relative position of the wire-loop in the plane of the flame, because the screw of the cap containing the tube would permit the cap to turn farther or not far enough to give this desired relation. In that case, also, the vertical or ascending portions of the wire were necessarily so remote from the flame as to be little affected thereby when not exactly opposite the edges of the flame.

I am also aware that separate heating-wires inserted through the cap have been proposed, which had their free ends bent inward above the wick-tube, so as to stand in the midst of the flame. This construction is objectionable and impracticable, because the wires in this position materially dim the flame and causeit to smoke. I am acquainted with the con struction shown in the patent to Rogers, No.. 233,024, dated Cctober 1880, in which the free ends of the two heating-wi res are directed inwardly to the flame near the top ofthe wicktnbe. This construction lacks effectiveness, and both this and the last beforementioned device are objectionable, because the wires present free ends at the top, where they are very likely to be displaced. As compared with all former constructions with which I am acquainted the device herein shown and claimed has the merit of being entirely practicable and of exposing a large extent of wire to the heating effect of the flame without appreciably affecting the illumination or impeding the operation of trimming the wick.

I claim as my invention 1. The combination, with the wick-tube and cap, of a heating-wire secured in the cap and extended in loop form over the flame and having its transverse portion in the plane of the Wick-tnbe, and also having an offset portion opposite the top of the Wick-tube, whereby shears may be conveniently employed for trimming the wick, substantially as described.

2. The combination, with the Wick-tube A and the cap B, of a Wire, C, extending in loop form over the flame and in the plane of 1311620 wick-tube, said heating-wire being offset op posite the top of the wick-tube and having its. ends terminated separatelyin eyes a, substan tially as described Intestimony that I claim the foregoing as 25 my invention I affix my signature in presence of two Witnesses.

GEORGE MA CLARK.

Witnesses:

M. E. DAYTON, O. CLARENCE PooLn. 

